656426425 has 12 divisors (see below), whose sum is σ = 814797676. Its totient is φ = 524606400.

The previous prime is 656426413. The next prime is 656426437. The reversal of 656426425 is 524624656.

It is an interprime number because it is at equal distance from previous prime (656426413) and next prime (656426437).

It can be written as a sum of positive squares in 6 ways, for example, as 1731856 + 654694569 = 1316^2 + 25587^2 .

It is a de Polignac number, because none of the positive numbers 2^k-656426425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12667 + ... + 38383.

Almost surely, 2^656426425 is an apocalyptic number.

It is an amenable number.

656426425 is a deficient number, since it is larger than the sum of its proper divisors (158371251).

656426425 is a wasteful number, since it uses less digits than its factorization.

656426425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26748 (or 26743 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 656426425 is about 25620.8201469040. The cubic root of 656426425 is about 869.0845282760.

The spelling of 656426425 in words is "six hundred fifty-six million, four hundred twenty-six thousand, four hundred twenty-five".